- Bluetooth 5.3; Chip: JL AC7003-2. Battery capacity: 130mAh; Charging time: approximately 2 hours-3. Usage time: 20 hours; Standby time: 350 hours-4. Material: ABS；Size: The total length of the earphones is 88cm; Weight: 20.8g-5. Support for both Chinese and English prompt tones: double-click the multifunction key in unpaired state